Business Acquisition (Summary of operational results of AAC) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												9 Months Ended	12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Net sales	$ 226,700	$ 222,100	$ 215,600	$ 199,300	$ 213,000	$ 191,300	$ 203,200	$ 172,300	$ 177,500	$ 178,800	$ 172,300	$ 181,300		$ 863,717	$ 779,839	$ 709,868
Operating loss														76,151	91,776	63,895
Loss before income taxes														54,708	78,266	51,478
Net loss attributable to the Company	$ 5,900	$ 15,300	$ 1,100	$ 10,800	$ 15,800	$ 13,100	$ 10,400	$ 13,500	$ 37,600	$ 9,700	$ (2,200)	$ 12,200		$ 33,111	$ 52,733	$ 57,279
Loss per share:
Basic	$ 0.19	$ 0.47	$ 0.03	$ 0.34	$ 0.49	$ 0.41	$ 0.32	$ 0.42	$ 1.18	$ 0.30	$ (0.07)	$ 0.38		$ 1.03	$ 1.64	$ 1.79
Diluted	$ 0.19	$ 0.47	$ 0.03	$ 0.34	$ 0.49	$ 0.41	$ 0.32	$ 0.42	$ 1.18	$ 0.30	$ (0.07)	$ 0.38		$ 1.03	$ 1.64	$ 1.79
Albany Aerostructures Composites LLC (AAC) [Member]
Business Acquisition [Line Items]
Net sales													$ 67,011
Operating loss													(1,246)
Loss before income taxes													(2,342)
Net loss attributable to the Company													$ (1,495)
Loss per share:
Basic													$ (0.05)
Diluted													$ (0.05)